why

code/modules/food_and_drinks/recipes/tablecraft/recipes_meat.dm

@@ -213,7 +213,7 @@
 	)
 	result = /obj/item/reagent_containers/food/snacks/salad/gumbo
 	subcategory = CAT_MEAT
-	
+
 /datum/crafting_recipe/food/goliathcalamari
 	name = "Goliath Calamari"
 	reqs = list(
@@ -221,4 +221,4 @@
 		/datum/reagent/consumable/cooking_oil = 10
 	)
 	result = /obj/item/reagent_containers/food/snacks/goliathcalamari
-	
+	subcategory = CAT_MEAT

code/modules/unit_tests/crafting_recipes.dm

@@ -0,0 +1,7 @@
+/datum/unit_test/crafting_recipes/Run()
+	for(var/i in GLOB.crafting_recipes)
+		var/datum/crafting_recipe/R = i
+		if(!R.subcategory)
+			Fail("Invalid subcategory on [R] ([R.type]).")
+		if(!R.category && (R.cateogry != CAT_NONE))
+			Fail("Invalid category on [R] ([R.type])")